.form{
    width: 36%;
    padding: 20px;
    background: white;
    box-sizing: border-box;
    border-radius: 12px;
}
.main{
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    background: whitesmoke;
}

/*适配手机端页面*/
@media screen and (max-width: 400px) {
    .form{
        width: 100%;
        padding: 10px;
        margin: 5px;
    }
}
